CN107639110B - Device for repairing contaminated soil - Google Patents
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- CN107639110B CN107639110B CN201710981626.9A CN201710981626A CN107639110B CN 107639110 B CN107639110 B CN 107639110B CN 201710981626 A CN201710981626 A CN 201710981626A CN 107639110 B CN107639110 B CN 107639110B
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Abstract
The invention relates to a device for repairing polluted soil, which comprises a burning unit, wherein a smoke outlet of the burning unit is provided with a secondary combustion chamber, heat exchange equipment and a semi-dry reactor which are sequentially communicated; the device also comprises a drying unit, an air bag machine and a granulator, wherein a feeding hole of the incineration unit is communicated with a discharging hole of the drying unit; the exhaust port of the heat exchange equipment is communicated with the feed port of the drum machine, and the hot gas outlet of the drum machine is communicated with the steam inlet of the drying unit; the steam outlet of the steam packing machine is communicated with the steam inlet of the granulator, the dust outlet at the bottom of the semi-dry reactor is communicated with the feed inlet of the granulator, and the discharge outlet of the granulator is communicated with the feed inlet of the drying unit. The device has high heat utilization rate, basically no waste of heat generated by fuel combustion, reduced fuel consumption of the incineration unit and effectively reduced repair cost; the water vapor and the dry hot gas separated by the drum machine can be fully utilized, so that the treatment cost is further reduced; can effectively avoid secondary pollution in the process of flue gas purification.
Description
Technical Field
The invention belongs to the field of polluted soil remediation in the technical field of environmental engineering, and particularly relates to a device for remedying polluted soil.
Background
The rapid development of the urbanization and the national economy of China also aggravates the problem of urban soil pollution to a great extent. This effect is mainly reflected in the mass production and transfer of pollutants, a significant portion of which directly or indirectly enter urban and surrounding soil ecosystems. Soil is originally a natural accommodation place and a purification treatment place of various wastes, but when various pollutants accommodated in the soil are excessive, the self-cleaning capacity of the soil is influenced and exceeded, so that the soil has harmful effects on hygiene and epidemiology, and the soil is polluted. Causes soil pollution, such as industrial sludge, garbage agriculture, sewage irrigation and the like.
The thermal desorption technology is one of the main technologies for remedying the polluted soil at present in China, and the technology is a process of heating by direct or indirect heat exchange to ensure that organic volatile matters and semi-volatile matters in the soil reach a high enough temperature to be evaporated and separated from a soil medium. The heat transfer medium in the thermal desorption device is air, combustion gas, inert gas and the like, and the thermal desorption process is a physical process of transferring the pollution components in the soil from a solid phase (liquid phase) to a gas phase.
Thermal desorption techniques have been successfully used in remediation projects for contaminated sites associated with polycyclic aromatic hydrocarbons, other non-halogenated semi-volatile organic compounds, benzene series, other non-halogenated volatile organic compounds, organic pesticides and herbicides, other halogenated semi-volatile organic compounds, halogenated volatile organic compounds, polychlorinated biphenyls. It is clear that the main application areas of thermal desorption technology are semi-volatile and volatile organic pollutants, including polycyclic aromatic hydrocarbons, organic pesticides and insecticides, polychlorinated biphenyls, etc.
The main process of the traditional thermal desorption technology is that the polluted soil enters a drying kiln and a rotary kiln, and after flue gas discharged from a secondary combustion chamber enters a waste heat boiler, hot water vapor generated by heat exchange is directly discharged into the atmosphere, so that great energy loss is caused, and particularly as shown in figure 1, the traditional device for repairing the polluted soil generally comprises a pretreatment unit 1, a feeding unit 2, an incineration unit 4 and a dust treatment unit 7 which are sequentially communicated; the smoke outlet of the incineration unit 4 is provided with a front-end cyclone dust collector 6A-1, a secondary combustion chamber 6B, a heat exchange device 5B, a rear-end cyclone dust collector 6A-2, a semi-dry reactor 6G, a bag-type dust collector 6D and an induced draft fan 6E which are sequentially communicated, and smoke generated in the incineration unit 4 sequentially passes through the devices.
Disclosure of Invention
The invention aims to provide a device for repairing polluted soil aiming at the defects of the prior art, so that the problem of secondary pollution generated during flue gas purification is avoided while waste heat recovery and utilization are realized.
In order to solve the technical problems, the technical scheme of the invention is as follows: a device for repairing polluted soil comprises an incineration unit, wherein a smoke outlet of the incineration unit is provided with a secondary combustion chamber, a heat exchange device and a semi-dry reactor which are sequentially communicated; the incinerator also comprises a drying unit, an air bag machine and a granulator, wherein a feed inlet of the incineration unit is communicated with a discharge outlet of the drying unit; an exhaust port of the heat exchange equipment is communicated with a feed inlet of a drum machine, a hot gas outlet of the drum machine is communicated with a gas inlet of the drying unit, and a water vapor outlet of the drum machine is communicated with a vapor gas inlet of the granulator; and a dust outlet at the bottom of the semi-dry reactor is communicated with a feed inlet of the granulator, and a discharge outlet of the granulator is communicated with a feed inlet of the drying unit.
When the device is used for treating the soil in a polluted site in the background technology, the tail gas discharged from the smoke outlet of the incineration unit often contains a large amount of semi-volatile and volatile organic pollutants, the tail gas is ignited and combusted by adding agents such as urea and the like in the secondary combustion chamber to treat the tail gas, so that the organic pollutants are converted into harmless substances, sulfur-containing and nitrate-containing substances in the tail gas are converted into solid harmless substances to be enriched at the bottom of the secondary combustion chamber, the temperature of the treated tail gas in the secondary combustion chamber is higher, the tail gas exchanges heat with water in heat exchange equipment when passing through the heat exchange equipment, the temperature of the tail gas is reduced, and the heat exchange equipment utilizes the heat exchanged by the high-temperature tail gas to produce hot water vapor; according to the invention, the steam wrapping machine is arranged at the exhaust port of the heat exchange equipment, hot water vapor is separated into dry hot gas and water vapor after entering the steam wrapping machine, the hot gas and the water vapor respectively enter the drying unit and the granulator, the hot gas entering the drying unit can preheat the polluted soil to be treated, the temperature and the water content of the soil to be treated are improved, the volume of the soil to be treated is reduced to a certain extent, the treatment pressure of the incineration unit is reduced, the ignition frequency and time are both reduced, and the consumption of fuel oil and other fuels is reduced, so that the soil remediation cost is saved; in addition, the tail gas from the heat exchange equipment enters the semi-dry reactor, harmful substances are further adsorbed by lime, active carbon and other medicaments in the semi-dry reactor, the tail gas is further purified, at the moment, a part of harmful polluted dust is enriched at the bottom of the semi-dry reactor, for example, residual medicament brought out from the secondary chamber, lime, activated carbon and the like adsorbing harmful substances in the semi-dry reactor and harmful substances in tail gas are directly discharged to generate secondary pollution, therefore, the invention sends the polluted dust enriched in the semi-dry reactor into a granulator, meanwhile, the water vapor generated by the drum machine is sent into a granulator for granulation, the polluted dust particles obtained by granulation are put into a drying unit again for the next round of treatment, so as to remove harmful substances in the next round of treatment, thereby avoiding secondary pollution generated during flue gas purification and protecting the ecological environment. In the whole device operation process, the used heat of drying unit can be provided by the dry hot gas that the drum machine isolated completely, the used water of granulator granulation is provided by the vapor that the drum machine isolated, need not to consume extra energy and raw materials thing, drying unit, granulator and drum machine three synergism, the hot gas of drying and the vapor of make full use of drum machine isolation, realize the waste heat of tail gas itself and the make full use of the new gain of heat behind the combustion of second combustion chamber, reduce soil repair cost, simultaneously, carry out the granulation retreatment to the pollution dust of enrichment in the semi-dry reactor, the secondary pollution problem that produces when solving flue gas purification.
The drying unit comprises a hopper for receiving materials and a dryer connected to the bottom of the hopper, wherein a feed inlet and a steam inlet of the dryer are respectively communicated with a discharge port of the granulator and a hot gas outlet of the drum machine.
The incineration unit comprises a drying kiln and a rotary kiln which are distributed up and down, a feed port of the drying kiln is communicated with a discharge port of the drying unit, and the discharge port of the drying kiln is communicated with a feed port of the rotary kiln.
A front-end cyclone dust collector is connected between the smoke outlet of the incineration unit and the secondary combustion chamber, and the gas outlet of the front-end cyclone dust collector is communicated with the gas inlet of the secondary combustion chamber so as to carry out primary dust removal on tail gas; and a rear-end cyclone dust collector is connected between the heat exchange equipment and the semi-dry reactor, and an air outlet of the rear-end cyclone dust collector is communicated with an air inlet of the semi-dry reactor so as to further remove dust from the tail gas.
The dust processing device also comprises a dust processing unit, and the dust enriched at the bottoms of the front-end cyclone dust collector, the secondary combustion chamber and the rear-end cyclone dust collector is conveyed into the dust processing unit through a conveyor with a skirt edge.
The dust treatment unit comprises a flat conveyer arranged below a discharge port of the incineration unit, and a magnetic separation device is arranged at a discharge end of the flat conveyer to separate out magnetic substances.
The side part dust outlet of the semi-dry reactor is connected with a bag-type dust remover, and an exhaust port of the bag-type dust remover is connected with an induced draft fan, wherein the induced draft fan can provide negative pressure for the whole pipeline system, so that smoke can effectively flow.
The drying device is characterized by further comprising a pretreatment unit and a feeding unit, wherein the feeding end of the feeding unit is arranged below the discharge hole of the pretreatment unit, and the discharge end of the feeding unit is communicated with the feed inlet of the drying unit. So as to crush and screen the soil to be treated and send the soil to the subsequent functional unit through the feeding unit.
Further, a condenser used for further cooling the water vapor is arranged between the steam packing machine and the granulator, so that the condensation effect is increased.
Furthermore, the power system of the drying kiln and the rotary kiln preferably comprises a variable frequency motor, a speed reducer, a coupling and a gear shaft. The variable frequency motor is decelerated by a speed reducer, and the variable frequency motor is connected with a gear set through power output by a coupler to drive the kiln to rotate.
Further, the conveying equipment in the dust treatment unit is provided with a cooling device to reduce the temperature of the material discharged from the rotary kiln.
Further, the whole process system and equipment should also comprise an oil supply unit, a water supply unit, a medicament adding unit and the like.
Further, the steel frame of each unit design is connected with the foundation.
Furthermore, all the pipelines used for connection are high-temperature-resistant steel pipes.
Further, the heat exchange device is a waste heat boiler, preferably a forced waste heat boiler.
The invention can repair the polluted soil in a large area and high efficiency. Hot water vapor generated by heat exchange through heat exchange equipment enters a steam drum machine, dry hot gas and water vapor are separated out through the steam drum machine and respectively enter a dryer and a granulator, wherein the dry hot gas preheats the pretreated soil, the water vapor and polluted dust generated by enrichment of a semi-dry reactor enter the granulator to be removed for granulation, and finally the water vapor enters the dryer for drying treatment. Through the technical measures, the soil remediation cost can be saved, the working efficiency of the drying kiln is improved, the secondary pollution generated during the flue gas purification can be avoided, the ecological environment is protected, and the popularization and the application are facilitated.
Compared with the prior art, the invention has the following beneficial effects:
(1) the heat utilization rate is high, the heat generated by fuel combustion is basically not wasted, the tail gas waste heat is used for soil preheating, the fuel consumption of the incineration unit is reduced, and the polluted soil remediation cost is effectively reduced;
(2) the water vapor and the dry hot gas separated by the drum machine can be fully utilized, so that the resource can be utilized for multiple times, and the treatment cost is further reduced;
(3) after the polluted dust enriched in the drying reactor is granulated, a new round of restoration treatment is carried out, so that the secondary pollution in the flue gas purification process is effectively avoided, and the ecological environment is protected.
Drawings
Fig. 1 is a schematic structural view of a conventional apparatus for remediating contaminated soil.
Fig. 2 is a schematic structural view of an apparatus for remediating contaminated soil according to a first embodiment of the present invention.
Fig. 3 is a schematic view of a drying process of the drying unit according to the first embodiment of the present invention.
In the figure: 1-pretreatment unit, 2-feeding unit, 3-drying unit, 3A-hopper, 3B-dryer, 3C-granulator, 4-incineration unit, 4A-drying kiln, 4B-igniter, 4C-power unit, 4D-riding wheel set, 4E-rotary kiln, 4F-igniter, 4G-power unit, 4H-riding wheel set, 5-waste heat utilization unit, 5A-steam packing machine, 5B-heat exchange equipment, 6-flue gas purification unit, 6A-1-front end cyclone dust collector, 6A-2-rear end cyclone dust collector, 6B-secondary combustion chamber, 6C-igniter, 6G-semi-dry reactor, 6D-cloth bag dust collector, 6E-induced draft fan, The device comprises a 6F-chimney, a 7-dust treatment unit, a 7A-magnetic separation device, a 7B-iron container storage box, a 7C-clean soil storage box, a 7D-flat conveyor and a 7E-skirt conveyor.
Detailed Description
For a better understanding of the invention for those skilled in the art, reference will now be made in detail to the embodiments illustrated in the accompanying drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
Fig. 2 is a schematic view of an apparatus for restoring contaminated soil according to a first embodiment of the present invention. Specifically, the device for repairing polluted soil comprises a pretreatment unit, a feeding unit, a drying unit, an incineration unit, a waste heat utilization unit, a flue gas purification unit and a dust treatment unit. The pretreatment unit 1 is connected with the feeding unit 2; the feeding unit 2 is connected with a hopper 3A, the dryer 3B is arranged above a drying kiln 4A, and the drying kiln 4A is arranged above a rotary kiln 4E and is connected with a flange through a steel frame structure; the flat conveyor 7D and the conveyor 7E with the skirt are positioned below the rotary kiln 4E, the front-end cyclone dust collector 6A-1, the rear-end cyclone dust collector 6A-2 and the secondary combustion chamber 6B, and the rear end of the flat conveyor is provided with a magnetic separation device 7A; the air inlet of the front-end cyclone dust collector 6A-1 is communicated with the smoke outlet of the drying kiln 4A, and the air outlet of the front-end cyclone dust collector 6A-1 is communicated with the air inlet of the secondary combustion chamber 6B; an air outlet of the secondary combustion chamber 6B is communicated with an air inlet of the heat exchange equipment 5B; a discharge port of the heat exchange device 5B is communicated with an air inlet of a rear-end cyclone dust collector 6A-2, hot water vapor after heat exchange enters a steam packing machine 5A, and dry hot gas and water vapor separated by the steam packing machine 5A respectively enter a dryer 3B and a granulator 3C, wherein the dry hot gas preheats the pretreated soil, and the water vapor enters the granulator 3C; an air outlet of the rear-end cyclone dust collector 6A-2 is communicated with an air inlet of the semi-dry reactor 6G, polluted dust at the bottom of the semi-dry reactor 6G is conveyed into the granulator 3C through a pipeline, is mixed with water vapor generated by the steam packing machine 5A, is subjected to dust removal granulation, and finally enters the dryer 4A for drying treatment; the 6D air inlet of the bag-type dust collector is connected with the tail end of the 6G outlet of the semi-dry reactor; the air inlet of the induced draft fan 6E is communicated with the air outlet of the bag-type dust collector 6D; and the air inlet of the chimney 6F is communicated with the air outlet of the induced draft fan 6E, and the air outlet of the chimney 6F is communicated with the atmosphere.
The polluted soil needs to be pre-selected and pretreated by a pretreatment unit 1, such as screening and crushing.
The pretreated contaminated soil is conveyed to a drying unit 3 through a feeding unit 2.
The contaminated soil entering the dryer 3B is preheated by means of dry hot gases separated from the drum 5A.
The soil pretreatment drying kiln 4A is arranged above the rotary kiln 4E, a power unit 4C and a riding wheel group 4D are arranged at the bottom of the drying kiln 4A and are power executing mechanisms, and an igniter 4B is arranged to carry out secondary heating on the polluted soil in the kiln; the bottom of the drying kiln 4E is provided with a power unit 4G and a riding wheel group 4H which are power executing mechanisms and are provided with an igniter 4F for heating the polluted soil in the kiln at high temperature. The power executing mechanism is a motor.
Steam chartered plane 5A and indirect heating equipment 5B link to each other, carry out produced hot water vapour of heat exchange and get into steam chartered plane 5A through indirect heating equipment 5B, it gets into desiccator 3B and granulator 3C respectively to separate out dry hot gas and vapor through steam chartered plane 5A, wherein dry hot gas preheats the preliminary treatment soil, the pollution dust that vapor and the enrichment of semi-dry reactor 6G produced gets into granulator 3C, get rid of the dust granulation, get into desiccator 3B at last and carry out drying process. The heat exchange device 5B is a forced waste heat boiler.
Flue gas which is subjected to heat exchange from the heat exchange device 5B enters the cyclone dust collector 6A-2, then enters the secondary combustion chamber 6B, then enters the semi-dry reactor 6G, then enters the bag-type dust collector 6D, and then enters the induced draft fan 6E and the chimney 6F, wherein the induced draft fan 6E provides negative pressure for the whole pipeline unit, so that the flue gas can effectively flow.
Clean soil from the drying kiln 4E, the front end cyclone dust collector 6A-1, the rear end cyclone dust collector 6A-2 and the secondary combustion chamber 6B is separated by a magnetic separation device 7A and then is respectively conveyed to an iron storage box 7B and a clean soil storage box 7C for storage through a flat conveyor 7D and a conveyor 7E with a skirt edge.
The working principle of the invention is as follows: after a power unit 4C and a power unit 4G of a drying kiln 4A and a rotary kiln 4E work, polluted soil is treated by a pretreatment unit 1 and then is conveyed to a hopper 3A by a feeding unit 2 to enter a dryer 3B for preheating, the preheated polluted soil enters the drying kiln 4A, an ignition unit 4B is ignited to preheat the polluted soil again, the heated polluted soil enters the rotary kiln 4E, an ignition unit 4F is ignited to fully heat the polluted soil, volatilized gas flows back through a negative pressure generated by a draught fan 6E in a flue gas purification unit 6 and enters a front-end cyclone dust collector 6A-1 through the drying kiln 4A for dedusting, the tail gas enters a secondary combustion chamber and then is ignited and heated by the ignition unit 6C, a medicament and air are added for desulfurization and denitration treatment, the treated tail gas enters a heat exchange device 5B, hot water vapor generated by heat exchange through the heat exchange device 5B enters a gas packing machine 5A, and (3) separating out dry hot gas and water vapor through a steam packing machine 5A, respectively entering a dryer 3B and a granulator 3C, wherein the dry hot gas preheats the pretreated soil, the water vapor and polluted dust generated by enrichment of the semi-dry reactor 6G enter the granulator 3C, the dust is removed, granulation is carried out, and finally, the polluted dust enters the dryer 3B for drying treatment. Through the technical measures, the soil remediation cost can be saved, the working efficiency of the drying kiln is improved, the secondary pollution generated during the flue gas purification can be avoided, the ecological environment is protected, and the popularization and the application are facilitated.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (10)
1. A device for repairing polluted soil comprises an incineration unit (4), wherein a smoke outlet of the incineration unit (4) is provided with a secondary combustion chamber (6B), a heat exchange device (5B) and a semi-dry reactor (6G) which are sequentially communicated; the device is characterized by also comprising a drying unit (3), an air bag machine (5) and a granulator (3C), wherein a feed inlet of the incineration unit (4) is communicated with a discharge outlet of the drying unit (3); an exhaust port of the heat exchange device (5B) is communicated with a feed port of the steam packing machine (5), and a hot gas outlet of the steam packing machine (5) is communicated with a gas inlet of the drying unit (3); a steam outlet of the steam packing machine (5) is communicated with a steam inlet of the granulator (3C), a dust outlet at the bottom of the semi-dry reactor (6G) is communicated with a feed inlet of the granulator (3C), and a discharge outlet of the granulator (3C) is communicated with a feed inlet of the drying unit (3).
2. The apparatus for remediating contaminated soil as recited in claim 1, wherein the drying unit (3) comprises a hopper (3A) for receiving the material and a dryer (3B) connected to a bottom of the hopper (3A), wherein a feed inlet and a steam inlet of the dryer (3B) are respectively communicated with a discharge port of the pelletizer (3C) and a hot gas outlet of the drum machine (5A).
3. The device for remediating contaminated soil as recited in claim 1, wherein the incineration unit comprises a drying kiln (4A) and a rotary kiln (4E) which are distributed up and down, a feed port of the drying kiln (4A) is communicated with a discharge port of the drying unit, and a discharge port of the drying kiln (4A) is communicated with a feed port of the rotary kiln (4E).
4. The device for remediating contaminated soil as set forth in claim 1, wherein a front end cyclone (6A-1) is connected between the smoke outlet of the incineration unit (4) and the secondary combustion chamber (6B), and the air outlet of the front end cyclone (6A-1) is communicated with the air inlet of the secondary combustion chamber (6B); a rear-end cyclone dust collector (6A-2) is connected between the heat exchange device (5B) and the semi-dry reactor (6G), and an air outlet of the rear-end cyclone dust collector (6A-2) is communicated with an air inlet of the semi-dry reactor (6G).
5. The apparatus for remediating contaminated soil as set forth in claim 4, further comprising a dust treatment unit (7), wherein dust enriched at the bottom of said front cyclone (6A-1), second combustion chamber (6B), and rear cyclone (6A-2) is transported into the dust treatment unit (7) by a skirted conveyor (7E).
6. Device for remediating contaminated soil according to claim 5, characterized in that said dust treatment unit (7) comprises a flat conveyor (7D) arranged below the discharge of the incineration unit (4), the discharge end of the flat conveyor (7D) being provided with a magnetic separation device (7A).
7. The apparatus for remediating contaminated soil as set forth in claim 1, wherein a bag-type dust collector (6D) is connected to a side dust outlet of the semi-dry reactor (6C), and an induced draft fan (6E) is connected to an exhaust port of the bag-type dust collector (6D).
8. The device for remediating contaminated soil according to any one of claims 1 to 7, further comprising a pretreatment unit (1) and a feeding unit (2), wherein a feeding end of the feeding unit (2) is disposed below a discharge port of the pretreatment unit (1), and a discharge end of the feeding unit (2) is communicated with a feed port of the drying unit (3).
9. An apparatus for remediating contaminated soil as claimed in any one of claims 1 to 7, wherein a condenser for further cooling the water vapour is provided between the air bagging machine and the pelletiser.
10. The apparatus for remediating contaminated soil as set forth in any one of claims 1 to 7, wherein said heat exchange device (5B) is a waste heat boiler.
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| CN201710981626.9A CN107639110B (en) | 2017-10-20 | 2017-10-20 | Device for repairing contaminated soil |
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| CN201710981626.9A CN107639110B (en) | 2017-10-20 | 2017-10-20 | Device for repairing contaminated soil |
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| CN108326028A (en) * | 2018-02-13 | 2018-07-27 | 浙江宜可欧环保科技有限公司 | The anhydrous spray process method of pyrolysis gas in pyrolysis device and pyrolysis device without water spray |
| CN109127700B (en) * | 2018-09-20 | 2020-12-25 | 航天凯天环保科技股份有限公司 | Remediation equipment for organic contaminated soil |
| CN113894150A (en) * | 2021-09-03 | 2022-01-07 | 广西博世科环保科技股份有限公司 | Energy-saving efficient thermal desorption remediation method for organic contaminated soil |
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| US7606919B2 (en) * | 2006-01-26 | 2009-10-20 | Tangopoint, Inc. | System and method for managing maintenance of building facilities |
| CN203018449U (en) * | 2012-11-07 | 2013-06-26 | 周昱 | Heat-treatment restoration equipment for polluted soil |
| CN103008337B (en) * | 2012-12-16 | 2014-11-12 | 华中农业大学 | System and method for repairing organic material polluted soil |
| CN103658165B (en) * | 2013-12-10 | 2015-12-02 | 北京鼎实环境工程有限公司 | A kind of energy-saving organic polluted soil thermal desorption restoration processing system |
| CN204448809U (en) * | 2015-01-23 | 2015-07-08 | 苏州同和环保工程有限公司 | A kind of for the system in the heat treatment restorative procedure of contaminated soil |
| CN105583221A (en) * | 2016-02-25 | 2016-05-18 | 北京神雾环境能源科技集团股份有限公司 | Soil restoration system and soil restoration method thereof |
| CN205926587U (en) * | 2016-08-03 | 2017-02-08 | 中钢集团天澄环保科技股份有限公司 | Mercurous pollution treatment system is restoreed to high -efficient thermal desorption |
| CN106424111B (en) * | 2016-09-29 | 2022-07-15 | 豆海建 | Soil remediation device and method |
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